re PR tree-optimization/61266 (FAIL: gcc.dg/Wstrict-overflow-18.c  (test for bogus messages, line 20))

2014-05-23  Richard Biener  <rguenther@suse.de>

	PR testsuite/61266
	* gcc.dg/Wstrict-overflow-18.c: Revert un-XFAILing and
	adjust testcase to reflect reality.

From-SVN: r210846